Welding and cutting apparatus



May '3, 1938.

R.J.KEHL

WELDING AND CUTTING APPARATUS Filed July 15,-1932 ATTORNEY 25 the welding of joints between thin walled steel a d H a affords a convenient d ip by 'rtanisdm aieaa' p 2,11 ,352

UNITED STATES PATENTOFFICE WELDING AND CUTTING APPARATUS Robert J. Kehl, Baysidc, N. Y., assignor, by memo assignments, to Union Carbide and Carbon Corporation, a corporation of New York Application July 13, 1932, Serial No. 622.111

7 Claims. (01. 158-27.4)

This invention relates to blowpipes for use in Fig. 2 is a fragmentary view in longitudinal secweldlng or cutting metals and has more partion and on an enlarged scale compared with Fig. ticular application to the construction of hand Sh g the handle assembled with the related operated blowpipes whereby they may be adapted parts and the valves located at the forward end to more varied uses than has been heretofore of the handle assembly.

possible. Fig. 3is a view similar to Fig. 2 showing the In the ordinary use of hand operated blowpipes valves at the rear end of the assembly. for welding and cutting, it has been customary o t purp disclosing the P p s 0! and, under certain circumstances, highly desirthe invention, the same is herein shown and deable to have the valves controlling the flow of sc ed as e ed in a Welding p l e- Re 1 fluids to the blowpipe head located at the rear ferring to the figures 0f t e d a in d t 8 end of the handle. In recent years, however, new a e H s w s having h'cse attaching fields of welding activity have developed in which blo k B nn ted to i r r end and a nozzle it is desirable that these valves should be located upp block N at its f w d, t hic at the forward end of the handle and in constant a is secured stem S y 'Which oz le 15 sensitive control of the hand of the operator by y g head A is pp Which he supports theblowpipe. Frequently, in The handle H is provided with conduits II and the same shop, it is desirable to have the valves ll extending therethrcugh and the flow yg at one end or theother of the blowpipe handle and fuel gases through. thes d s o p eto suit the diilerent conditions met with in differ- Viding a combustible mixture is under control a,

ent jobs or the particular preferences of several Valves nd V located djacent O e end 01' the operators using the same blowpipe. Typical f handle in avalve block I3 which serves as a plug jobs in which it is desirable to have the control to clcsecne d f t hollow dl casing l2: valves located at the forward end of the handle is the ha d asin se v to pr t t nduits ll tubing as in the manufacture of airplane fusilages e s of which the apparatus may be pp dwhere careful and delicate manipulation of the The other end of the casing is closed y 3 P i! valves is necessary if satisfactory results are to 3; andthese plugs are P d d at their outer be obtained. ends with identically shaped recesses l4 and I l In order that the same blo'wpipe apparatusmay which are coaxial With the a preferably f 30 be employed to advantage in various situations on hap a d positioned to face n pp site such as referred to above, and in order to avoid dir cti The valves d VI e p a y the necessity of providing special blowpipes for p t ed a an angle t0 t andle so as to 6X- each of such situations, it is desirable and theretend forwardly or rearwardly according as they fore an object of this invention to provide a novel are positioned at the forward real end of the 35 blowpipe construction in which the position of the an l ss m l e; the an le at which the valves valves for controlling the flow of fluid to the head a D cd being such that W ted at the may be. reversed so as to position them either at f d e d of the assemblage y ay be d ly the forward or rear end of the blowpipe handle manipulated by the thumb or -fore finger of the 40 as may be desired. hand with which the operator supports the torch 40 In accordance with this invention, a handle and to this end an angle of about to the hanfor the blowpipe may be provided having its ends die is found convenient. of identical contour and adapted to interchange- The plugs l3, l3 are provided with pairs of ablylnterflt with ends of elements of the blowpassa s l l6 and I5 and i6 connected with pipe construction also having identical contours; conduits Ill and II and leading to separate and 45 the handle and the said elements having passages corresponding points in the respective recesses ll.

therethrough opening in their ends in identical I4; passages l5, l5 connecting with conduit l0;

positions and under control of valves located at and passages l6, IS with conduit ll. Conone end of the handle. veniently, passages i 5, l5 may connect the con- Other objects and novel features of the lnvenduit H) with depressions ll, l'l at the bottoms of 30 tion will be made apparent from the following the recesses l4 and II while the passages l6, II specifications taken with the accompanying drawmay connect conduit I l with the annular depresing in which, sions I8, l8 formed in the walls of the recesses ll, r Fig. 1 is an elevational view oi a blowplpe conl4 at points spaced from depressions l1, I1.

structed in accordance with this invention. The recesses l4, H are preferably located as shown in extensions l9, I! of the plugs II, It and the nozzle supporting block N and the hose attaching block B are provided with extensions 2|, 20' respectively of identical contour, corresponding to and adapted to be interchangeably and snugly received in the recesses I l, H. The blocks N and B are adapted to be secured to the plugs i3 and II "by threaded connections between sleeves 2i, 2i, swiveled respectively to blocks N and B, and extensions I9, l9. The threaded bores of the sleeves 2i, 2| are. of the same diameter and threading as are also the extensions l9, I9 so that these connections are interchangeable as will readily appear.

The hose attaching block B is provided with an oxygen passage and a fuel passage F opening through extension 20' so as to coincide in position to the passages I 5 and It or ii and i6 as the case may be, and passage F may be supplemented by a further passage F formed in the block B where it is impossible to provide a single drilling sufficiently large to supply the required quantity of fuel gas as is usually the case in constructions of this character.

"The conical projection 20 may be conveniently formed integrally with a mixing nozzle 22 having a central bore 23 therethrough connected, when the blowpipe handle is assembled, either with passage I5 or IE and side pasages 24 paralleling bore 23 and communicating with passages IB or IE, according to which end of the handle is connected therewith. The passages 24 are connected to passages H5 or iii through an annular recess 25 formed in projection 20 and recess II or it constituting together an annular distributing chamber when the nozzle supporting block is assembled with the handle.

The mixing nozzle 22 may be removably connected in the nozzle supporting block N as by a threaded connection at 26 and the gases of com- 'bustion are mixed preferably at the forward end of the nozzle 22 in the chamber 21 before passing to the tip or head A; gas from bore 23 discharging through the orifice 23a and that from passages 24 passing around the end of the nozzle 22 through the annular passage 29 surrounding the reduced diameter portion 28 of the nozzle 22.

From the above description, it will appear that the nozzle supporting and hose attaching blocks may be interchangeably connected with either end of the handle or, in other words, the handle may be reversed in position with respect to these two members and thereby the valves W and V may be located at either the forward or rear end of the handle as assembled with the other elements making up the blowpipe construction. In this manner the valves may be positioned to best suit the convenience of the operator and to the various requirements of the work at hand and the necessity of providing a plurality of blowpipes to suit the preference of various individuals or the different requirements of various jobs may be avoided.

It will be understood that numerous changes may be made in the details of construction herein disclosed without departing from the spirit of the invention or sacrificing any of its advantages.

I claim:

1. The combination of a handle haying gas passages therethrough; valves controlling said passages and mounted on said handle closer to one end of the latter than to its other end; means for supplying gas to said passages; means so constructed and arranged that such gas supplying means may be coupled at will to either end of said handle to supply gases to said passages; a nozzle supporting member; and means so constructed and arranged that said member may be coupled to either end of said handles.

2. The combination of a handle having separate gas passages therethrough; valves controlling said passages and mounted on said handle closer to one end thereof than to its other end; means for mixing the gases delivered by said passages; and means so constructed and arranged that such gas mixing means may be coupled at will to either end of said handle to receive gases from said passages.

3. In a blowpipe, the combination of a handle having separate gas passages therethrough terminating adjacent the ends of said handle; valves for controlling said passages and mounted adjacent one end of said handle; a gas-supply device having gas passages adapted to register with the ends of the gas passages at either end of the handle; a gas-mixing device having gas passages adapted to register with the ends of the gas passages at either end of the handle; and means whereby said devices may be coupled at will and interchangeably to either end of the handle, to locate said valves either adjacent to the supply device or adjacent to the mixing device, as desired.

4. In a blowpipe, the combination of a handle having independent gas passages therethrough terminat ng at the ends of said handle; means carried by said handle for controlling the flow of gases through said passages; a gas-supply device constructed to be operatively coupled to either end of said handle to supply gas to said gas passages; and a gas-delivery device constructed to be operatively coupled to either end of said handle to receive gas from said gas passages.

5. In combination, a blowpipe handle having valve means adjacent one end thereof, the opposite ends of the handle having identical contours; a nozzle block; and a hose block, said blocks being connectibie interchangeably with the ends of the handle.

6. In combination, ,a blowpipe handle, a nozzle support and a hose block; said handle, nozzle support and block each having passages therethrough; the handle having identically shaped ends and the passages through the handle each having both of its ends opening at identical positions in said ends; said nozzle support and block each having an end complementarily shaped to interchangeably connect with the ends of the handle; and the passages through the head and block opening at the ends thereof to coincide and connect with openings of the conduits through said handle; and valves adjacent one end of the handle for controlling the flow of fluid through the passages therein.

7. In combination, a blowpipe assembly including a handle having conduits therethrough and valves positioned nearer one end of said handle than the other for controlling the passage of fluid through said conduits; nozzle supporting means and hose attaching means connected with said handle; said handle being reversible with respect to said nozzle supporting means and said hose attaching means, to position said valves either adjacent the forward end or the rear end of said assembly.

ROBERT J. Km. 

